Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f02f8686ae246fe…

MALICIOUS

PDF

79.4 KB Created: 2021-03-20 04:42:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3f62c9516d62b7f8dba0cd089f5e4319 SHA-1: 51b62ea759c05f4468a64406608f6feb4576f41a SHA-256: 4f02f8686ae246fe22dbbfe5e90084795403770f3744e146a9dbf0d8c6532d0f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/strik?utm_term=campos+de+acci%25C3%25B3n+de+la+psicolog%25C3%25ADa+organizacional+pdf PDF link annotation
    • http://hardcreditcheck.info/tubideximozozy1ns8.pdfIn PDF document text
    • http://1pokypki.website/michelin_guide_gourmet_fair_seoulv9evx.pdfIn PDF document text
    • http://begemot.space/22928408188kkfe.pdfIn PDF document text
    • http://profyhouse.ru/what_is_credit_to_gdp_gap1gdm9.pdfIn PDF document text
    • https://cdn.sqhk.co/kupejabel/Vjfjfwv/76026188244.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/metro_2033_chapter_4_outpost_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/hpYhgCJ/big_button_launcher_apk.pdfIn PDF document text
    • http://umkatrade.ru/how_do_you_open_a_locked_oven_door1uzgx.pdfIn PDF document text
    • http://rankingcoach-seo.com/9square_for_instagram_apkswcmx.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebapenuj/righ27W/biruduxib.pdfIn PDF document text
    • http://totalcreditreport.info/native_american_zodiac_wolf_meaning3sir9.pdfIn PDF document text
    • http://lifeeuro.info/yamaha_01v96_v2_manual_espaolrsssg.pdfIn PDF document text
    • http://qwonder.space/naxirirazidatarodevus19u9e.pdfIn PDF document text
    • https://cdn.sqhk.co/jafakitiw/ihFC7kS/femig.pdfIn PDF document text
    • http://sizerasadaxer.mywebcommunity.org/79767493014.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5820434f-e33d-4879-82b1-dc30527f924e/how_to_cook_vegetables_in_steam_oven.pdfIn PDF document text
    • http://donijexufenu.onlinewebshop.net/birds_of_egypt.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/titulos_de_credito_definicion_doctrinal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f35dde37-ad43-42e0-b78d-a0746660f189/83651331886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a830eb64-dfc2-4f07-88b6-438ea5fdf4a9/garmin_vivofit_2_not_syncing_steps.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/lonolowipabazopuk.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/bienestar_digital_android_pie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f513a9cb-0e14-4be9-baa0-607c3930c9a4/55206659869.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1D 1572 bytes
SHA-256: 452612010bf92904adaef4bfd0d246ec5f24367bf67eb47c7737d6475a0c45d1
font_01_sfnt_off0000f320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF320 5620 bytes
SHA-256: bf9da3fb5d5a1752aad72034e672ce3696c1727aeb2a2730a0521b2b17953498
font_02_sfnt_off000105e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E9 12188 bytes
SHA-256: a36fa2788b9a50b7b23d6c122ff823a0077913d61905c3d98f830df4eb67d5da

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